Exhaust Info & Opinions, Please

[hauoli63]

Okay, guys, please excuse my ignorance ... but I would like some help!

My 03 GT is in the shop right now having the exhaust done ... this is what they are installing:
1. Shorty Headers, JBA
2. High Flow catalitic converter X-Pipe, Magnaflow
3. Dynomax Catback
4. EEC IV/EEC V4 bank chip

If you wouldn't mind, please explain what each of these do and were they good suggestions by the shop.

Thanks Much!

 

[GTvert01]

1-3 improve exhaust flow over restrictive stock parts,resulting in more power and a highly improved exhaust note.Those are good parts, but I don't know what number 4 is.Maybe someone else can handle that one,I've never heard of it.

 

[hauoli63]

Thank you for an easy to understand explaination!